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Encyclopedia > ABox

In Computer Science, an Abox is an "assertion component"—a fact associated with a terminological vocabulary within a knowledge base. Computer science, or computing science, is the study of the theoretical foundations of information and computation and their implementation and application in computer systems. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...


The terms Abox and Tbox are used to describe two different types of statements in ontologies. Tbox statements describe a system in terms of controlled vocabularies, for example, a set of classes and properties. Abox are Tbox-compliant statements about that vocabulary. This article is about the philosophical meaning of ontology. ...


Tbox statements are sometimes associated with object-oriented classes and Abox statements associated with instances of those classes.


Together Abox and Tbox statements make up a knowledge base. To meet Wikipedias quality standards, this article or section may require cleanup. ...


Examples of Abox and Tbox statements

Abox statements typically have the form:

 A is an instance of B 

or

 John is a Person 

This should be contrasted with Tbox statements or (statements) about terminology such as:

 All Students are subclasses of Person 

or

 There are two types of Persons: Students and Teachers 

Tbox statements tend to be more permanent within a knowledge base and tend to be stored in a data model or a metadata registry. In contrast, Abox statements are much more dynamic in nature and tend to be stored as instance data within transactional systems within relational databases. A Metadata Registry is a central place where metadata definitions are stored and maintained. ...


See also


  Results from FactBites:
 
Description logic - Wikipedia, the free encyclopedia (1113 words)
In DLs, a distinction is drawn between the so-called TBox (terminological box) and the ABox (assertional box).
In general, the TBox contains sentences describing concept hierarchies (i.e., relations between concepts) while the ABox contains "ground" sentences stating where in the hierarchy individuals belong (i.e., relations between individuals and concepts).
For example, a reasoner might process the TBox and ABox separately, in part because certain key inference problems are tied to one but not the other one ('classification' is related to the TBox, 'instance checking' to the ABox).
  More results at FactBites »


 

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